Hutxon. — On new Land Shells. 186 



large, rather oblique, subcircular, broader than high ; peristome thin, 

 regularly arched, the columellar margin slightly reflected. Greatest 

 diameter 0-07, least 0-055; height 0-03 inch. 



Animal. — Body short, eye-peduncles long and thick, tentacles short ; 

 mantle rather posterior, enclosed ; foot narrow, without locomotive disc, 

 pointed behind, not extending beyond the shell ; no caudal gland. Colour 

 pale grey, eye-peduncles and a stripe on each side of the head dark sooty- 

 brown. Dentition 13-1-13. 



Hab. Eyreton, North Canterbury (Mr. C. Chilton), Christchurch (Mr. 

 J. F. Armstrong). 



Genus Gerontia, g. n. 



Animal heliciform ; mantle rather posterior, included ; tail acute, with 

 a mucous pore but no papilla. Jaw smooth, striated. Shell depressed, 

 umbilicated, of about five gradually-increasing whorls ; aperture oblique. 



This genus differs from Patula in having a mucous gland on the tail. 



Gerontia pantherina, sp. nov. 



Shell subdiscoidal, broadly umbilicated, striated, horny brown. Spire 

 slightly convex, whorls five, slowly increasing, rather flat, w T ith rather close 

 but irregular oblique stria? , which are membranous on the upper surface, 

 interstices not reticulated ; suture impressed ; umbilicus more than one- 

 fourth of the greatest diameter of the shell, perspective ; aperture oblique, 

 rotund, slightly flattened below ; peristome thin, the margins rapidly con- 

 verging ; columellar margin not reflected. 



Greatest diameter 0-37, least 0-33 ; height 0-16 inch. Teeth, 18-1-18. 



Animal. — Top of the head yellow ; peduncles and a line on each side of 

 the head black, rest of the body pale grey spotted with dark grey, the spots 

 often collected into groups, a regular line of dark grey spots runs along each 

 side, and they meet on the tail just over the mucous pore ; below this line 

 the side of the foot is marked with oblique dark stripes ; sole white, the 

 margin with grey spots. 



Hab. Greymouth (Mr. E. Helms). 



Strobila leiodus, sp. nov. 



Shell minute, subdiscoidal, umbilicated, ribbed; colour horny with 

 longitudinal bands of pale rufous. Spire almost flat, but very slightly con- 

 vex ; whorls five, very slowly increasing, rounded, with numerous oblique 

 narrow ribs, about thirty in the tenth of an inch, the interstices finely 

 striated with growth-lines ; suture impressed : umbilicus rather narrow, 

 about one-sixth the diameter of the shell, nearly cylindrical, margined with 

 brown : aperture vertical, rather narrow, lunate ; peristome simple, thin, 

 the right lip at first ascending, then descending and sweeping forwards, 

 leaving a shallow posterior sinus, afterwards regularly arched, columellar 



